Class: AWSCarb::UserData

Inherits:
Object
  • Object
show all
Includes:
Singleton
Defined in:
lib/aws-carb/user_data.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Instance Attribute Details

#combined_user_data ⇒ Object

Returns the value of attribute combined_user_data.



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# File 'lib/aws-carb/user_data.rb', line 8

def combined_user_data
  @combined_user_data
end

Instance Method Details

#combine_user_data(config, user_data_template_resolved) ⇒ Object 



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# File 'lib/aws-carb/user_data.rb', line 54

def combine_user_data(config, user_data_template_resolved)

  # if user_data_template and user_data are supplied then combine them, otherwise just
  # use user_data (which is empty by default)
  begin
    if config[:ec2].andand[:user_data]
      user_data = config[:ec2][:user_data]
    end

    if ! user_data_template_resolved.nil? and ! user_data.nil?
      puts "# combining user_data with user_data_template"
      user_data = user_data_template_resolved + user_data
      puts
    elsif ! user_data_template_resolved.nil? and user_data.nil?
      debug "# no raw user_data parsed in"
      user_data = user_data_template_resolved
      debug
    elsif user_data.nil?
      debug "# no user_data or user_data_template specified on the command line"
      user_data = ""
      debug
    else
      debug "# using user_data from cli argument"
      debug
    end

  rescue => e
    puts "# failed to combine user_data!"
    die e
  end

  return user_data
end

#create(config) ⇒ Object 



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# File 'lib/aws-carb/user_data.rb', line 10

def create(config)
  user_data_template_resolved = resolve_template(config)
  @combined_user_data         = combine_user_data(config, user_data_template_resolved)
  return @combined_user_data
end

#display ⇒ Object 



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# File 'lib/aws-carb/user_data.rb', line 88

def display
  return if @combined_user_data.nil?

  puts "# --- beginning of user_data ---"
  puts
  begin
    puts @combined_user_data
  rescue => e
    puts "error: could not display user_data!"
    puts e
  end
  puts
  puts "# --- end of user_data ---"
  puts
end

#resolve_template(config) ⇒ Object 



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# File 'lib/aws-carb/user_data.rb', line 16

def resolve_template(config)

  user_data_template         = nil
  resolved_template          = nil

  # FIXME: blank templates / empty templates / no template should work..

  return nil unless config[:ec2] and config[:user_data_template][:file]

  ShellSpinner "# loading template", false do
    begin
      template_file = config[:user_data_template][:file]

      raise ArgumentError, "no such file: #{template_file}" unless File.exist?(template_file)

      user_data_template = File.read(template_file)
    rescue => e
      puts "# unable to open template file:"
      die e
    end
  end

  puts

 ShellSpinner "# parsing template"  do
    begin
      resolved_template = Erubis::Eruby.new(user_data_template).result(config[:user_data_template_variables])
    rescue => e
      puts "# failed to resolve variables in user_data_template:"
      die e
    end
  end

  puts

  return resolved_template
end